Compact liquid-outlet system and oral cleaning method

Abstract

A compact liquid-outlet system comprising a liquid pump device, a liquid-inlet flow channel, and a liquid-outlet flow channel and an oral cleaning method. The liquid pump device comprises a liquid pump cavity, a piston slidably disposed in the liquid pump cavity, and a piston rod. The piston rod extends through the liquid pump cavity in a liquid-tight manner and is connected to the piston. The piston divides a pump chamber of the liquid pump cavity into a rod chamber and a rodless chamber. The piston comprises a liquid-outlet one-way valve allowing only liquid to flow from the rod chamber to the rodless chamber. The liquid-inlet flow channel communicates with the rod chamber through a liquid-inlet one-way valve. The liquid-outlet flow channel communicates with the rodless chamber. This system eliminates the need of extra space for installing the liquid-outlet one-way valve, resulting in a more compact structure.

1 . A compact liquid-outlet system, comprising:
 a liquid pump device ( 1 ) comprising a liquid pump cavity ( 11 ), a piston ( 12 ) and a piston rod ( 13 ), wherein the piston ( 12 ) is slidably disposed in the liquid pump cavity ( 11 ), and the piston rod ( 13 ) extends through the liquid pump cavity ( 11 ) in a liquid-tight manner and is connected to the piston ( 12 ); wherein the piston ( 12 ) divides a pump chamber of the liquid pump cavity ( 11 ) into a rod chamber ( 14 ) and a rodless chamber ( 15 ); wherein the piston ( 12 ) comprises a liquid-outlet one-way valve ( 2 ) allowing only liquid to flow from the rod chamber ( 14 ) to the rodless chamber ( 15 );   a liquid-inlet flow channel ( 3 ) communicated with the rod chamber ( 14 ) through a liquid-inlet one-way valve ( 4 ); and   a liquid-outlet flow channel ( 5 ) communicated with the rodless chamber ( 15 ).   
     
     
         2 . The compact liquid-outlet system according to  claim 1 , wherein the liquid-outlet one-way valve ( 2 ) comprises a liquid-outlet valve chamber ( 21 ), a liquid-outlet valve core ( 22 ), and a liquid-outlet valve seat ( 23 ), wherein the liquid-outlet valve chamber ( 21 ) is formed in the piston ( 12 ) and has an opening facing the rodless chamber ( 15 ), the liquid-outlet valve core ( 22 ) is floatingly disposed in the liquid-outlet valve chamber ( 21 ), and the liquid-outlet valve seat ( 23 ) is formed in the piston ( 12 ) and is disposed at a side of the liquid-outlet valve chamber ( 21 ) away from the rodless chamber ( 15 ); wherein the liquid-outlet valve seat ( 23 ) is provided with an overflow hole ( 231 ) for communicating the liquid-outlet valve chamber ( 21 ) and the rod chamber ( 14 ); wherein the liquid-outlet valve core ( 22 ) abuts the liquid-outlet valve seat ( 23 ) when the piston ( 12 ) performs an exhaust stroke, and the liquid-outlet valve core ( 22 ) is spaced apart from the liquid-outlet valve seat ( 23 ) when the piston ( 12 ) performs a suction stroke. 
     
     
         3 . The compact liquid-outlet system according to  claim 1 , wherein the compact liquid-outlet system further comprises a nozzle ( 6 ) communicated with the liquid-outlet flow channel ( 5 ), wherein the rodless chamber ( 15 ) is in a negative pressure state when the piston ( 12 ) performs a suction stroke, during which time a volume increase of the rodless chamber ( 15 ) is greater than a volume decrease of the rod chamber ( 14 ). 
     
     
         4 . The compact liquid-outlet system according to  claim 1 , further comprising a release system ( 7 ) comprising a release flow channel ( 71 ) and a post-peak release mechanism ( 72 ), wherein the release flow channel ( 71 ) is communicated with the rodless chamber ( 15 ), and the post-peak release mechanism ( 72 ) is configured to block the release flow channel ( 71 ), wherein the post-peak release mechanism ( 72 ) is configured to open the release flow channel ( 71 ) only when the piston ( 12 ) performs the exhaust stroke and after a flow peak occurs in the liquid pump device ( 1 ). 
     
     
         5 . The compact liquid-outlet system according to  claim 4 , wherein the post-peak release mechanism ( 72 ) comprises a moving rod ( 721 ) and an elastic reset member ( 722 ), wherein the moving rod ( 721 ) extends through the liquid pump cavity ( 11 ), and the elastic reset member ( 722 ) is configured for driving the moving rod ( 721 ) to reset, wherein a first end of the moving rod ( 721 ) is provided with a release valve core ( 723 ) for blocking the release flow channel ( 71 ), and a second end of the moving rod ( 721 ) is provided with a top-abutting member ( 724 ), wherein the top-abutting member ( 724 ) abuts the liquid-outlet one-way valve ( 2 ) or the piston ( 12 ) after the flow peak occurs in the liquid pump device ( 1 ). 
     
     
         6 . The compact liquid-outlet system according to  claim 5 , wherein the release flow channel ( 71 ) comprises a vertical flow channel segment ( 711 ) and a transverse flow channel segment ( 712 ), wherein the vertical flow channel segment ( 711 ) extends along an axial direction of the liquid pump cavity ( 11 ) to communicate with the rodless chamber ( 15 ), and the transverse flow channel segment ( 712 ) extends along a radial direction of the liquid pump cavity ( 11 ) to communicate with the vertical flow channel segment ( 711 ); wherein the moving rod ( 721 ) extends through the vertical flow channel segment ( 711 ) in a clearance manner, and the top-abutting member ( 724 ) extends into the rodless chamber ( 15 ) or the liquid-outlet valve chamber ( 21 ) to limit the liquid-outlet valve core ( 22 ) in the liquid-outlet valve chamber ( 21 ). 
     
     
         7 . The compact liquid-outlet system according to  claim 1 , wherein the liquid pump cavity ( 11 ) comprises a liquid-inlet adapter ( 111 ) and a liquid-outlet adapter ( 112 ) socketed to each other, and a first groove structure of the liquid-inlet adapter ( 111 ) and a second groove structure of the liquid-outlet adapter ( 112 ) jointly define the pump chamber of the liquid pump cavity ( 11 ). 
     
     
         8 . The compact liquid-outlet system according to  claim 1 , wherein the liquid-outlet flow channel ( 5 ) comprises a nozzle jack ( 51 ) and a guiding channel ( 52 ) both formed in the liquid pump cavity ( 11 ), and the guiding channel ( 52 ) is communicated with the nozzle jack ( 51 ) and the rodless chamber ( 15 ), respectively. 
     
     
         9 . The compact liquid-outlet system according to  claim 1 , wherein the liquid pump cavity ( 11 ) is provided with a first sealing ring ( 16 ) and a second sealing ring ( 17 ), wherein the first sealing ring ( 16 ) is slidably arranged around the piston ( 12 ) in a liquid-tight manner, the second sealing ring ( 17 ) is slidably arranged around the piston rod ( 13 ) in a liquid-tight manner, and a maximum sealing pressure of the first sealing ring ( 16 ) is greater than a maximum sealing pressure of the second sealing ring ( 17 ). 
     
     
         10 . An oral cleaning method using a compact liquid-outlet system according to  claim 4 , comprising:
 pulling back the piston ( 12 ) through the piston rod ( 13 ) to perform the suction stroke, closing the liquid-inlet one-way valve ( 4 ), and opening the liquid-outlet one-way valve ( 2 ), such that liquid in the rod chamber ( 14 ) flows to the rodless chamber ( 15 ) through the liquid-outlet one-way valve ( 2 ), and liquid in the nozzle ( 6 ) flows back to the rodless chamber ( 15 );   pushing out the piston ( 12 ) through the piston rod ( 13 ) to perform the exhaust stroke, opening the liquid-inlet one-way valve ( 4 ), and closing the liquid-outlet one-way valve ( 2 ), such that liquid in the liquid-inlet flow channel ( 3 ) flows to the rod chamber ( 14 ) through the liquid-inlet one-way valve ( 4 ), and liquid in the rodless chamber ( 15 ) flows to the nozzle ( 6 ) through the liquid-outlet flow channel ( 5 ); wherein part of the liquid in the rodless chamber ( 15 ) flows back to a liquid storage tank through the release flow channel ( 71 ) after the flow peak occurs in the liquid pump device ( 1 ).